what is humming noise and wha is the reason to develop humming noise in a mv p

what is humming noise and wha is the reason to develop
humming noise in a mv pannel ?

Question Posted / rahul

2 Answers
4330 Views
HPL, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is humming noise and wha is the reason to develop humming noise in a mv pannel ?..

the humming noise is due to the MAGNETOSTRICTION phenomenon.
the magnetostriction is caused due to the quik magnetic
reversals in ac circuit. magnentostriction is developed from
the words 'magnetic' 'restriction' implies the opposition of
the reversals of the magnetizing current.or simply..
oppozing the magnetizing and demagnetizing processes..
due to this some energy is lost in heat and some enrgy is
lost inthe form of sound but notice that sound was aktualy
produced by the minute vibration of the core and some other
metal parts. but we cant see this vibration wth our naked eye.

generally megentostriction does not okkurs in dc ckts.

Is This Answer Correct ?

3 Yes

1 No

what is humming noise and wha is the reason to develop humming noise in a mv pannel ?..

Answer / amit

humming noise is a sound produced in power transmission line during the transmission of power.it is produced due to corona effect.it can be supresed by using stranded wires..

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

7 Answers

some times voltage does not built in small generators why ?

2 Answers

What is IGBT?Where it is used? What is the difference between IGBT and Thyristor?

5 Answers AC, Formo Plastic, HBL Power Systems, SECL,

what are the insulation properties.

2 Answers Cable Wireless, MAHINDRA,

How much CTs are required to measure th curent in DOL starting of motor?PLs explain.

1 Answers

What differance between Circuit brekar and Isolater?

14 Answers TATA,

What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?

0 Answers

what is the difference between dry and wet type of 132kV terminations. which one is durable

0 Answers

When connecting a loaded powerplant to the Huge grid,what are the factors to be considered and how the VAR flow will affect the system?

1 Answers

What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

0 Answers

How we Use DC Power in Transformers? is it possible ?

6 Answers

what is model question rrb junior engineer electrical gr.II

0 Answers

For more Electrical Engineering Interview Questions Click Here